import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import 'dart:developer' as developer;
import 'package:http/http.dart' as http;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
          // This is the theme of your application.
          //
          // TRY THIS: Try running your application with "flutter run". You'll see
          // the application has a purple toolbar. Then, without quitting the app,
          // try changing the seedColor in the colorScheme below to Colors.green
          // and then invoke "hot reload" (save your changes or press the "hot
          // reload" button in a Flutter-supported IDE, or press "r" if you used
          // the command line to start the app).
          //
          // Notice that the counter didn't reset back to zero; the application
          // state is not lost during the reload. To reset the state, use hot
          // restart instead.
          //
          // This works for code too, not just values: Most code changes can be
          // tested with just a hot reload.
          colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
          useMaterial3: true,
          brightness: Brightness.light,
          primaryColor: Colors.lightGreen[600]),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
        appBar: AppBar(
          // TRY THIS: Try changing the color here to a specific color (to
          // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
          // change color while the other colors stay the same.
          backgroundColor: Theme.of(context).colorScheme.inversePrimary,
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text(widget.title),
        ),
        body: Center(
          // Center is a layout widget. It takes a single child and positions it
          // in the middle of the parent.
          child: Column(
            // Column is also a layout widget. It takes a list of children and
            // arranges them vertically. By default, it sizes itself to fit its
            // children horizontally, and tries to be as tall as its parent.
            //
            // Column has various properties to control how it sizes itself and
            // how it positions its children. Here we use mainAxisAlignment to
            // center the children vertically; the main axis here is the vertical
            // axis because Columns are vertical (the cross axis would be
            // horizontal).
            //
            // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
            // action in the IDE, or press "p" in the console), to see the
            // wireframe for each widget.
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              ElevatedButton(
                  style: const ButtonStyle(),
                  onPressed: () async {
                    final url = Uri.parse('https://www.baidu.com');
                    await launchUrl(url, mode: LaunchMode.externalApplication);
                  },
                  child: const Text('跳转百度')),
              ElevatedButton(
                  style: const ButtonStyle(),
                  onPressed: () {
                    http.get(Uri.parse('http://httpbin.org/')).then((response) {
                      developer.log("状态：${response.statusCode}");
                      developer.log("正文：${response.body}");
                    });
                  },
                  child: const Text('发起Http请求')),
            ],
          ),
        ) // This trailing comma makes auto-formatting nicer for build methods.
        );
  }
}
